My classmate Wang Yong always comes up special solutions ____ our math problems.[ ]

There is______ old football under ______ bed. I like to play ______ football.

Tom helps me _____ my English every day.[ ]

_____ is known to us all that the 2012 Olympic Games will take place in London．

Do you know whose book this is?—Let me have a look . It Wei Fang’s . Look, here is her name.